diff --git a/_debug_replacements.php b/_debug_replacements.php
index 7f670ca..878baf2 100644
--- a/_debug_replacements.php
+++ b/_debug_replacements.php
@@ -7,13 +7,15 @@
  */
 
 $vers = '???';
-$f = file_get_contents(__DIR__ . '/../user/version.h');
-preg_match_all('/#define FW_V_.*? (\d+)/', $f, $vm);
+$versfn = __DIR__ . '/../user/version.h';
+if (file_exists($versfn)) {
+	$f = file_get_contents($versfn);
+	preg_match_all('/#define FW_V_.*? (\d+)/', $f, $vm);
 #define FW_V_MAJOR 1
 #define FW_V_MINOR 0
 #define FW_V_PATCH 0
-
-$vers = $vm[1][0].'.'.$vm[1][1].'.'.$vm[1][2];
+	$vers = $vm[1][0] . '.' . $vm[1][1] . '.' . $vm[1][2];
+}
 
 return [
 	'term_title' => ESP_DEMO ? 'ESPTerm Web UI Demo' : 'ESPTerm local debug',
@@ -29,6 +31,7 @@ return [
 	'bm4' => '',
 	'bm5' => '05',
 	'labels_seq' => ESP_DEMO ? 'TESPTerm Web UI Demo
OK
Cancel


Help' : 'TESPTerm local debug
OK
Cancel


Help',
+	'want_all_fn' => '0',
 
 	'parser_tout_ms' => 10,
 	'display_tout_ms' => 15,
@@ -55,7 +58,7 @@ return [
 	'time' => date('G:i'),
 	'vers_httpd' => '0.4',
 	'vers_sdk' => '010502',
-	'githubrepo' => 'https://github.com/MightyPork/esp-vt100-firmware',
+	'githubrepo' => 'https://github.com/espterm/espterm-firmware',
 
 	'ap_dhcp_time' => '120',
 	'ap_dhcp_start' => '192.168.4.100',
diff --git a/js/term.js b/js/term.js
index 098bae0..b1bc897 100644
--- a/js/term.js
+++ b/js/term.js
@@ -1,5 +1,6 @@
 /** Init the terminal sub-module - called from HTML */
-window.termInit = function (labels, theme) {
+window.termInit = function (opts) {
+  let { labels, theme, allFn } = opts
   const screen = new TermScreen()
   const conn = Conn(screen)
   const input = Input(conn)
@@ -8,7 +9,7 @@ window.termInit = function (labels, theme) {
   screen.input = input
 
   conn.init()
-  input.init()
+  input.init({ allFn })
   termUpload.init()
   Notify.init()
 
diff --git a/js/term_input.js b/js/term_input.js
index a01df39..e42ee35 100644
--- a/js/term_input.js
+++ b/js/term_input.js
@@ -15,7 +15,7 @@
  * m - mouse move
  */
 window.Input = function (conn) {
-  let opts = {
+  let cfg = {
     np_alt: false,
     cu_alt: false,
     fn_alt: false,
@@ -37,24 +37,24 @@ window.Input = function (conn) {
 
   /** Fn alt choice for key message */
   function fa (alt, normal) {
-    return opts.fn_alt ? alt : normal
+    return cfg.fn_alt ? alt : normal
   }
 
   /** Cursor alt choice for key message */
   function ca (alt, normal) {
-    return opts.cu_alt ? alt : normal
+    return cfg.cu_alt ? alt : normal
   }
 
   /** Numpad alt choice for key message */
   function na (alt, normal) {
-    return opts.np_alt ? alt : normal
+    return cfg.np_alt ? alt : normal
   }
 
-  function _bindFnKeys () {
+  function _bindFnKeys (allFn) {
     const keymap = {
       'tab': '\x09',
       'backspace': '\x08',
-      'enter': opts.crlf_mode ? '\x0d\x0a' : '\x0d',
+      'enter': cfg.crlf_mode ? '\x0d\x0a' : '\x0d',
       'ctrl+enter': '\x0a',
       'esc': '\x1b',
       'up': ca('\x1bOA', '\x1b[A'),
@@ -109,7 +109,12 @@ window.Input = function (conn) {
       // we don't implement numlock key (should change in numpad_alt mode, but it's even more useless than the rest)
     }
 
+    const blacklist = [
+      'f5', 'f11', 'f12', 'shift+f5'
+    ]
+
     for (let k in keymap) {
+      if (!allFn && blacklist.includes(k)) continue
       if (keymap.hasOwnProperty(k)) {
         bind(k, keymap[k])
       }
@@ -127,17 +132,19 @@ window.Input = function (conn) {
     key.unbind(combo)
 
     key(combo, function (e) {
-      if (opts.no_keys) return
+      if (cfg.no_keys) return
       e.preventDefault()
       sendStrMsg(str)
     })
   }
 
   /** Bind/rebind key messages */
-  function _initKeys () {
+  function _initKeys (opts) {
+    let { allFn } = opts
+
     // This takes care of text characters typed
     window.addEventListener('keypress', function (evt) {
-      if (opts.no_keys) return
+      if (cfg.no_keys) return
       let str = ''
       if (evt.key) str = evt.key
       else if (evt.which) str = String.fromCodePoint(evt.which)
@@ -185,7 +192,7 @@ window.Input = function (conn) {
     bind('⌘+backspace', '\x15') // ⌘⌫ to delete to the beginning of a line (possibly ^U)
     /* eslint-enable */
 
-    _bindFnKeys()
+    _bindFnKeys(allFn)
   }
 
   // mouse button states
@@ -194,8 +201,8 @@ window.Input = function (conn) {
   let mb3 = 0
 
   /** Init the Input module */
-  function init () {
-    _initKeys()
+  function init (opts) {
+    _initKeys(opts)
 
     // Button presses
     $('#action-buttons button').forEach(function (s) {
@@ -235,11 +242,11 @@ window.Input = function (conn) {
 
     /** Enable alternate key modes (cursors, numpad, fn) */
     setAlts: function (cu, np, fn, crlf) {
-      if (opts.cu_alt !== cu || opts.np_alt !== np || opts.fn_alt !== fn || opts.crlf_mode !== crlf) {
-        opts.cu_alt = cu
-        opts.np_alt = np
-        opts.fn_alt = fn
-        opts.crlf_mode = crlf
+      if (cfg.cu_alt !== cu || cfg.np_alt !== np || cfg.fn_alt !== fn || cfg.crlf_mode !== crlf) {
+        cfg.cu_alt = cu
+        cfg.np_alt = np
+        cfg.fn_alt = fn
+        cfg.crlf_mode = crlf
 
         // rebind keys - codes have changed
         _bindFnKeys()
@@ -247,20 +254,20 @@ window.Input = function (conn) {
     },
 
     setMouseMode: function (click, move) {
-      opts.mt_click = click
-      opts.mt_move = move
+      cfg.mt_click = click
+      cfg.mt_move = move
     },
 
     // Mouse events
     onMouseMove: function (x, y) {
-      if (!opts.mt_move) return
+      if (!cfg.mt_move) return
       const b = mb1 ? 1 : mb2 ? 2 : mb3 ? 3 : 0
       const m = packModifiersForMouse()
       conn.send('m' + encode2B(y) + encode2B(x) + encode2B(b) + encode2B(m))
     },
 
     onMouseDown: function (x, y, b) {
-      if (!opts.mt_click) return
+      if (!cfg.mt_click) return
       if (b > 3 || b < 1) return
       const m = packModifiersForMouse()
       conn.send('p' + encode2B(y) + encode2B(x) + encode2B(b) + encode2B(m))
@@ -268,7 +275,7 @@ window.Input = function (conn) {
     },
 
     onMouseUp: function (x, y, b) {
-      if (!opts.mt_click) return
+      if (!cfg.mt_click) return
       if (b > 3 || b < 1) return
       const m = packModifiersForMouse()
       conn.send('r' + encode2B(y) + encode2B(x) + encode2B(b) + encode2B(m))
@@ -276,7 +283,7 @@ window.Input = function (conn) {
     },
 
     onMouseWheel: function (x, y, dir) {
-      if (!opts.mt_click) return
+      if (!cfg.mt_click) return
       // -1 ... btn 4 (away from user)
       // +1 ... btn 5 (towards user)
       const m = packModifiersForMouse()
@@ -286,11 +293,11 @@ window.Input = function (conn) {
     },
 
     mouseTracksClicks: function () {
-      return opts.mt_click
+      return cfg.mt_click
     },
 
     blockKeys: function (yes) {
-      opts.no_keys = yes
+      cfg.no_keys = yes
     }
   }
 }
diff --git a/lang/en.php b/lang/en.php
index e099ce2..9c57a65 100644
--- a/lang/en.php
+++ b/lang/en.php
@@ -60,6 +60,7 @@ return [
 	'term.show_buttons' => 'Show buttons',
 	'term.loopback' => 'Local Echo',
 	'term.crlf_mode' => 'Enter sends CR+LF',
+	'term.want_all_fn' => 'Capture all keys<br>(F5, F11, F12…)',
 	'term.button_msgs' => 'Button codes<br>(ASCII, dec, CSV)',
 
 	'cursor.block_blink' => 'Block, blinking',
diff --git a/pages/cfg_term.php b/pages/cfg_term.php
index 10ed719..e4dba6b 100644
--- a/pages/cfg_term.php
+++ b/pages/cfg_term.php
@@ -165,6 +165,12 @@
 		<input type="hidden" id="fn_alt_mode" name="fn_alt_mode" value="%fn_alt_mode%">
 	</div>
 
+	<div class="Row checkbox" >
+		<label><?= tr('term.want_all_fn') ?></label><!--
+		--><span class="box" tabindex=0 role=checkbox></span>
+		<input type="hidden" id="want_all_fn" name="want_all_fn" value="%want_all_fn%">
+	</div>
+
 	<div class="Row checkbox" >
 		<label><?= tr('term.crlf_mode') ?></label><!--
 		--><span class="box" tabindex=0 role=checkbox></span>
diff --git a/pages/term.php b/pages/term.php
index 16130c8..bbf97cd 100644
--- a/pages/term.php
+++ b/pages/term.php
@@ -72,7 +72,11 @@
 <script>
 	try {
 		window.noAutoShow = true;
-		termInit('%j:labels_seq%', +'%theme%');
+		termInit({
+		  labels: '%j:labels_seq%',
+		  theme: +'%theme%',
+		  allFn: !!+'%want_all_fn%',
+        });
 	} catch(e) {
 		console.error(e);
 		<?php if (!DEBUG): ?>